LPCQP: Lightweight private circular query protocol for privacy-preserving k-NN search. - Yasuhito Utsunomiya; Kentaroh Toyoda; Iwao Sasase (CCNC, 2015)

LPCQP: Lightweight Private Circular Query Protocol with Divided POI-table and Somewhat Homomorphic Encryption for Privacy-Preserving k-NN Search. - Yasuhito Utsunomiya; Kentaroh Toyoda; Iwao Sasase (J. Inf. Process., 2016)